Single trigger mechanism



NQV. 3, 1931. J KAUTZKY' 5 1,829,958

SINGLE TRIGGER MECHANISM Filed June 22, 1931 Patented Nov. 3, 1931 i. FFEC E' JOSEPH KAU'lZKY, SR., OF FORT DODGE, IOWA SINGLE TRIGGER "MECHANISM Application filed June 22,

The object of this invention is to provide an improved single trigger mechanlsm for double-barrel guns of the over-underl type,

or in other words that type of gun in which may be fired first by operation of; single.

trigger. V a I Still another object isto provide animproved arrangement of parts for preventing immediate discharge of the second barrel af ter the discharge of the first barrel of a dou hle barrel gun through the recoil from the shoulder of the operator.

With these and other obj invention consists in the construction, ar-

lid

rangement and combination of the various parts of my device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and r j r 42 are located above the'hammer's and are V pivoted at 44 on the top bar 16. Each sear v illustrated in the accompanying drawings, in which Figure 1 is a longitudinalsection showing a gun lock embodying my improvedsingle trigger mechanism, showing the parts in the positions assumed after the firing of the first barrel and before the trigger has been released, so that the parts are locked against inadvertent discharge of the second barrel. Figure 2 is a cross section on theline 22 of Figure 1. t

Figure 3 is a detail horizontal sectionon the line 38 of Figure 1, illustrating particularly the selecting mechanism for deter- 1'; mining which barrel shall be fired first.

Figure 4 is a detail. longitudinal section of a portion of the mechanism, showing particularly the trigger and parts carried thereya a, Figure 5 is an elevation of the mechanism,

ects V in view my a M frame at 34 in a. conventional manner and are a 1931i Serial No. 546,037.

partly in section, showing the parts in posi tion for firing the second barrel when the trigger is pulled. a V p The numeral is employed to designate generally the frame of the gun lock. The frame 10 supports at its forward end the barrels 12 and 14, which are arranged one above the other. The'frame includes at its rear portion a top bar'16 and a bottom bar or trig- -7 ger plate 18 which are connected at their rear ends by a vertical crossbar 20, beyond which is the stock 22 of the gun. Most of the t:

mechanism is arranged within the spacebetween the top bar 16, trigger plate 18 and rear cross bar and is enclosed by portions? 24 of the stock extending forward on each side to meet the rear face of the frame.

Pivotally supported onthe frame and ex tending over the top bar l6v is a top'lever'2 6loperating a bolt mechanism 28. The primary functionofthe top lever 26 is, upon being moved laterally in one. direction,v topermit breaking of thefgun for loading and for, cocking the hammers.

Hammers 30 and 32 are pivoted in the adapted ,to'engage firing pins'36 and 38 re-' spectively for the upper barrel 12 and lower barrel 14. g j In thist'ype of mechanism the sears 40 and is formedintermediate of its ends 'jwitha downwardly projecting tooth 46 adapted to engage in a sear notch 48 'in thetop of one offlthe "hammersfor holding it in cocked position. Coil springs 50 are provided for yieldingly urging the sears toward the hammers, theseisprings being located between l the sears and the top plate rearwardly of the pivot 44.. Each hammer is formed with 'a rearwardly projecting tail piece 31 which engages the curved forward face of its'sear when it has been pulled'and'the hammer, is

down with its projecting tail piece directly under the sear, holding it up out of the w y i for the pull of the second sear.

When released the hammers 30 and 3 2are forcibly moved to firing position by means ice mounted side by side and,i-inrizs bstantiallyr vertical positions rearwardly of the haminers and 32. The posts have-:their lower ends loosely mounted in a supporting plate 68 which is mounted onand-xtends trans=- versely of the trigger plate 18 and bridges, V

' ger,- this lifting movement being accom-m pli shed through the agency of a selecting ,r

theiitrigger slot, The, posts-.rextend f'nearly} to'the top bar 16 and are arranged iorrlimited verticalimovement when thetriggeris pulled and thereby raisedatits rear. end. I .Tlil firing posts. i extend. loosely; through notches! :70. in

thejrear ,end; portions ,ot the. respective sears and,4c2 and :e'achfof said. sears is formed-i, y V

larlyg n Figure 3 and it lneludes aho'rizontalwith a shoulder "('2Ifb.eneath the corresponding:

sear. and ,adapted tlo raise the? latter at times for releasing it tromrtheih 'mmer withi'whiohf i is engaged by, neans 9f its :.tooth14c6,.i;n;the]n sear. motch. 48-; i

A fininglblo'ck '74 is arranged 'substan-w tiallyzvertic al position behind theifiringposts 64;.sand 66 andr fs' pivoted attitslowertend on the rojeetionfia'oftheitrigger y means of a pin :76; ,,Tl i'e bleck,7e is inormallyl. urged tor rrwardly; tilted; position, by I a light. @011 springfi 81 inountedin' a recess-71in thedblock and-engaging theikprojee'tion 62-1atta point: rearwardlyifof. the ,pivot- 16.".

Attimes thelc 1 1iekl74l is heldin' e w r i jlitslower end is spaced. suffieientlyifrointher trigger to, avoid; lifting ,eont-act. Stop -pins 96"and,9 8lare provided on the, upper face or M ,the trigger and onopposite sides of the pivot 92 for limitingtheiswinging novementof the tilted position as indieatedliydottedlinesil Figure (1, by neans of a leaflspringfillwhioh proj eqts. forwardly; from tthegrear cross bar A.

20 ,and ,h as at its ior wardz end a hook portion engaging- .a lateral propection orilugw82z'onithe upper endportion oftheblock.

to il nlock. and permit breaking: of the; gun. i Thissrearward, slidingmovementaof the barn 88gservesito swing; the firing blockfi lirearq. wardly, byi engagementwoit' the projection 86s.

TherblQck fll is formedonits forwardrface with) a thin. forwardly. projectingL ving-.84:

which lies between the :post s "6. Lampl fied;v The: forward, edge oft the. wing :85Lis adapted to be engaged bylk a projection 86 on .a. bar 588. which a is islidablynnounted on theuforward portion when. thetop. lever 26 is oscillated manually,

withv thetwing ,fil, untilthe lug. $2: on. the: said blocknis :in. position to .be:,engagedv .bv the spring 50, thereby. servingttoflholdithegblock. in its rearwardlyrtilted .position;.,;.

My invention rcontempl tes thatpthe barrel Iof thegunis toibell fired through. the v agency of. one of the? firing; posts. and the:

v swingthe;ibleele forwardly toward the posts 64 and 66; It will be noted that the block 74 qispfisuifiioi'entnwidth to extend beneath the rear portions of both of the sears 40 and 42. Oneonly of'thefiring posts 64 and 66 is elevated by .any given movement of the triginechanisni interposedtbetweenr the trigger.

and the ,lowerzend of eitherrone of theposts 'whereby the desiredbarrel of the gunwill 1 be fired.

The selecting mechanism is shown particu ly arranged selecting lever 90,-pivoted between its 'endsfat 92 on therupper' fate of e which projects through the trigger slot in either of its selected, positions. I When .so

the.-trigger'58I The lever 90isprovided-l atits forward end with "a thunib'piece 94 moved, therear end portion of the selecting i lever will beengaged beneath then-lower end of one or the other of the firing posts 64 and 66 andwill provides meansfor lifting such 1 post when the'trigger ispulle'd. f. The. other -,-one of the posts .will' nQtbe-raised because seleCting lever -.in.either direction. W,

A friction ing93J is slidabl'y mounted in" the' forward endier the trigger 58 and is backed by a coil spring 95. The end ofthev.

spring. friotionally i engages the selecting engagementserves to iho'ld thelever .intheselectedpOsition.

.previouslya describedyandrthe .block: is held. ,in,thisiposition b yl the spring 80..

Thereaften: rearwardipullson. the trigger lever90, whichis L-sha'peda nd embraces the i v forward end ofthetrigger, and thisfriction all ofizthe "trigger plate 18.: .The loan .88 is suit-1 ably connected at. its forward endtto the. bolt, mechanism 28sothatiit is movedxrearwardly. 1

Inoperatioii thefiselectingvlever isplaced 111 position ,for. first firing the desired, barrel firing. blb'ckfZlQ to rearwardly tilted position r l .7 through the action of thee sliding bar 88. :as r

58 ,ivilll'oause cone or\ the other oi the firing; i ;posts 64 or 66 to be raised through the instru-i rmentality of the; interposed rear end of the selecting lever 90, and this upward movement of the post, through its shoulder 72, acts to raise the rear lever of the corresponding sear 40 or 42 and thereby release the hammer which had been held in cocked position by said sear.

This pull on the trigger also causes the firing block .7 4 to be released from the holding spring 80, through a slight upward movement of the trigger projection 62, and the block is thus permitted to swing forwardly. However, the firing block does not immediately move to operative position beneath the sears but it still held inoperative so long as pressure is exerted on the trigger after the initial pull. This is to prevent inadvertent firing of the second barrel of the gun through recoil from the operators shoulder before the operator has had time to remove his finger from the trigger.

It will be noted that the sears 40 and 42 taper to sharp points at their rear ends, which ends project behind the posts 64 and 66. It will also benoted that the tail piece 31 on the hammer which has been released is in engagement with the curved forward face of its sear so that it holds the pointed rear end of said sear in slightly elevated position with respect to the other sear which is still holding its hammer in cocked position. This arrangement is clearly shown in Figure l. The firing block 7 4 is formed at its upper forward corner with a forwardly projecting tooth 75, which is capable of entering the space between the pointed ends of the sears when the sears are in the two different positions just described.

As the firing block 74 swings forwardly on its pivot after having been released from the hooked holding spring 80, it is in sufficiently elevated position, because of the continued pull on the trigger 58, that its tooth 7 5 will enter the space between the rear points of the two sears, thereby preventing the block from passing beneath the sear which is still in operative position. However, as soon as pressure is released from the trigger it will return to its normal position, thus permitting the firing block to move downwardly and still farther forwardly and come to a position beneath the rear points of the sears and in engagement with that one of the sears which is still in holding position.

In this connection it should be noted that the trigger 58 is normally held in its lowered position by means of a spring 100 coiled on a pin 102, which has its upper end seated in a recess in the forward face of the rear cross bar 20. The lower end of the rod 102 is bifurcated at 104: and this bifurcated portion straddles the rear end portion of the trigger projection 62, engaging in a notch 106 in the upper face of said projection.

Now when the trigger 58 is pulled a second time it will operate to raise the firing leasing the second hammer such as 30 and firing the other barrel of the gun.

It will be observed that in any given position of the selecting mechanism one only of the firing posts 6466 is employed for releasing a sear and that the other sear is released by action of the firing block 74 which is of such character as to operate upon either one of the sears which may be still in holding position when the firing block is in position for operation. It will be understood that if the firing block were not held inoperative by the spring 80, both sears would be conjunctively raised and both barrels would be fired at the first pull of the trigger, but this cannot ordinarily occur because the firing block is moved to inoperative position by the opera-- tion of the top lever 26 preliminary to cocking the gun.

I claim as my invention 1. In a gun lock, a frame, a pair of hammers pivoted therein, a pair of spring pressed sears pivoted in the frame above the respective hammers adapted to engage said hammers and hold them in cocked position, a triggerpivoted atits forwardend in the lower part of the frame, a firing post mounted above said trigger and adapted to be lifted when the trigger is pulled, said post having a part .0 engage one of said sears for releasing it from its hammer, a firing block pivoted on the rear end of the trigger and adapted to engage beneath the other sear for releasing it from its hammer, means for retaining said firing block in inoperative position temporarily, said block being released from said holding means by tlie first pull on the trigger, and yielding means for moving said block toward operative position when so released.

' 2. In a gun lock, a frame, a pair of hammers pivoted therein, a pair of spring pressed sears pivoted in the frame above the respective hammers adapted to engage said hammers and hold them in cocked position, a trigger pivoted at its forward end in the lower part of the frame, a pair of firing posts mounted above said trigger and arranged for limited vertical movement, each post having a part to engage one of the scars for releasing it from its hammer, a selecting lever arranged for manual actuation and having a part adapted to be interposed selectively beneath one of said posts whereby the selected post will be lifted when the trigger is pulled, a firing block pivoted on the rear end of the trigger and adapted to engage beneath the sears at times, said block being movable to inoperative position until after the first tending to move said block toward operative position.

3. In a gun look, a frame, a pair of hammers pivoted therein, a pair of spring pressed sears pivoted in the frame above the respective hammers adapted to engage said hammers and hold them in cocked position, a trigger pivoted at its forward end in the lower part of the frame, a pair of firing posts mounted above said trigger and arranged for limited vertical movement, each post having a part to engage one of the sears for releasing it from its hammer, a selecting lever arranged "for manual actuation and having a part adapted to be interposed selectively beneath one of said posts whereby the selected post will be lifted when the trigger is pulled, a firing block pivoted on the rear end of the trigger and adapted to engage beneath the scars at times, said block being movable to inoperative position until after the first hammer has been released, a spring latch for holdsaid block in inoperative position, said block being disengaged from said latch by lifting movement occasioned by the first pull on the trigger, and yielding means tending to move said block toward operative position, sai block being formed with a part for engaging above the rear end of the unreleased sear to hold it momentarily out of operative position beneath the sear, until such time as pressure on the trigger has been released.

l. A mechanism of the character described including a pair of pivoted spring pressed hammers, a pair of sears adapted to engage the hammers for holding them in cocked position, a pivotally mounted trigger, a pair of like firing members each arranged to engage and release one of the sears, a third firing member arranged to be moved by said trigger for engaging and releasing either one of the sears, a. selecting member capable of being positioned to cause one or tne other of the first named firing members to be moved by the trigger for operating upon the selected sear, and means for latching the third firing member in inoperative position, said latching means being released by a pull on the trigger to permit said third firing member to move toward operative position.

5. A mechanism of the character described including a pair of pivoted spring pressed hammers, a pair oi sears adapted to engage the hammers for holding them in cocked position, a pivotally mounted trigger, a pair of like firing members each arranged to engage and release one of the scars, a third firing member arranged to be moved by said trigger for engaging and releasing either one of the sears, a selecting member capable of bein positioned to cause one or the other of the first named firing members to be moved by the trigger for operating upon the selected scar, and means for latching the third firing member in inoperative position, said latching means being released by a pull on the trigger to permit said third firing member to move toward operative position, the last named firing member being formed with a part for holding it out of operative position relative to the sears, after the latch is released, until such time as the trigger has returned to normal position.

6. In a mechanism of the character described, a pair of pivoted spring pressed hammers each formed with a sear notch, a pair of sears pivotally mounted and each :t'o'med with a part for engaging the sear notch of a hammer for holding the latter' member in cocked position, a pair of firing posts arranged for limited movement beneath the respective sears and each formed with a part for moving one of the scars to releasing position, a trigger pivoted beneath said posts but spaced at all times therefrom, a selecting member adapted to be positioned between the trigger and one or the other of said posts tov upon a subsequent pull of the trigger.

Des Moines, Iowa June 15, 1931.

JOSEPH KAUTZKY, SR. 

